ENZFELDER GmbH

Power transmission

and

lifting engineering

RO

Spindle gear cubic

Type BG

History

1969 Mr. Enzfelder established a job shop in Vienna. Equipped with some machinery, the Enzfelder Company manufactured machine parts according to drawings. Within one year the number of employees rose to 3. The Enzfelder company started manufacturing threaded spindles and nuts according to drawings. Then the range of manufacturing was enlarged by toothed wheels, screw wheels and endless screws according to drawings. 1974 The company including the complete manufacture was relocated to Enzesfeld. 1975 The manufacture of spindle gears was launched. The company’s experience in the manufacture of trapezoid-threaded spindles, nuts, worm gear pairs and casings was a valuable basis for the construction. After many tests, the serial production of spindle gears was launched one year later. The result was a product characterized by a first-rate price-performance ratio. The product was distributed by dealers all over Europe. 1981 The planning and construction of small hydropower plants was launched to replace diesel generators. Environmental protection was not really a topic at that time, however, and the production was stopped in 1986. 1989 The Enzfelder GesmbH company replaced the Franz Enzfelder Company. 1990 Scissor-type lifting platforms and cable winches were added to the delivery program. 1991 Resilient spacer shafts were tested and added to the production range. At the same time, the telescopic spindle gear was developed. A patent for this principle was applied for and issued. 1993 The sale of spindle gears under their own name was launched and presented for the first time at the Hannover industrial fair. We have been approached with a variety of tasks and have provided solutions according to the customers’ needs ever since. 1994 In cooperation with our customers we produced the first bevel gears to specification. 1995 Spindle bearing arrangements were designed and included in the standard program. 1996 The Enzfelder company produced planet gear to specification for the first time. 1998-1999 The standard programs were enlarged. Additionally, bevel gears are manufactured in a standard design. 2000 The development of electric cylinders in standard design for very high loads (5-1000kN) was started. At the same time the telescopic spindle gears were refined to save the customer the guiding and locking devices. Since that time we have been able to offer telescopic cylinders, too. 2001 The development of electric cylinders was completed, and these cylinders were added to the standard program. At the same time the development and fabrication of cubic spindle gears for lifting loads between 2.5 and 150kN was started. These gears were added to the standard program as well. 2002 were extended and optimized the series of the electric cylinders. Further we provide an electronic 2D-3D product catalogue of the spindle gears, it makes it possible to integrate our products into your system. 2002-2003 We putted our new assembling and packaging hall, beside the manufacturing hall, in operation 2003 We increased our machinery by buying a CNC machine tool with 7 axes, brand AXA. That new CNC machine allows a precise machining of the screw jack housings in only two clamping. 2003-2004 The engineering started to use new 3-D CAD software, Solid Edge. That software enables our customers to integrate easily our drawings. 2004 We opened a sales office in France. 2004-2005 We started to design the high performance screw jacks HSG and we created a range of 10 different sizes. 2005 First participation to an exhibition in France: INDUSTRIE 2005 at Lyon. 2005-2006 We started to design a new range of telescopic screw jacks TSGLR. Today, these new telescopic screw jacks, with a more compact design, are used in the stage industry, in the aircraft industry, on train lifting equipments and in machine building. 2008 We replaced the tread grinding machine by a new CNC thread grinding machine, brand Mikromat. In the past years we solved problems of motive power engineering and lifting for our customers. We searched and found the optimal solution for each case and manufactured at the best possible price/performance ratio. Delivery 01-2009

Hand wheels

Ch 1 Ch 2

type

BG 5

BG 10

BG 25

BG 50, 100

BG 100, 150

d

80

125

160

200

250

N

26

31

36

42

48

b

13,0

15,0

18,0

20,5

23,0

n

16

18

20

24

28

L

30

34

37

45

51

G

58,5

67,5

67,5

80,0

90,0

D

22

23

23

26

28

10

14

14

18

24

0,16

1,3

1,5

1,0

1,3

Weight[Kg]

BGa F 7b P 9

c

5020

622,8

10025

827,3

15025

828,3

Dimensional variations accordingto DIN 7168 medium.

Deviating dimensions on request.

RPM - length - diagramm::

1 2 4 8 1625 30/50

90

800 1000 1500 2000 3000 4000 5000

3000

2000

1500

1000800

600500400

300

200

Selection chart forsizes according toRPM and length ofjoint

RPM n

(min )-1

length L(mm)

type G type GX type GZ

n

n

-1

-1

max 1500 min

max 3600 min

rated torque[Nm]type

weight[kg]

for 2hubs

for 1 mtube

max. shiftof angle pilot

drill

type G and GX type GZ

2

1

i

Mounting Spindle gears must be mounted in true alignment on a flat surface which must be so stiff that it can assume the maximal load without oscillations or deformations. The alignment and correct positioning of the spindle gear must be done very carefully as no side forces should act on spindle and guide rings. In lifting systems the spindle noses (in case of the basic type) or the traveling nuts (in case of the traveling nut type) must lie level with each other before the worms of the spindle gears are connected. Before the driving gear is mounted the sense of rotation must be checked: in bevel gear driven lifting systems the sense of rotation can easily be confused; the result would be faulty mounting and possible damage of the installation. Before putting it into service the spindle gear or the lifting system should be turned by hand once. If this requires non uniform forces the spindles are misaligned both to each other and to the installation. Adjustments are necessary; the fastening screws must be worked loose and the whole lifting gear must again be turned by hand. Spindles must be lubricated before being put into service; they are delivered non-greased! Oil-lubricated worm gears: the upper screwed sealing plug must be replaced by the vent screw provided. Attention! Misalignment and faulty gripping lead to increased power consumption, which is converted into friction and noise. The consequence is quick wear. Additional add-on pieces: check under “Options”. If our specifications and performances according to the technical instructions are nor observed and/or the components are not used as prescribed, any warranty claims will no longer be applicable. Maintenance Greases spindle and worm gear via lubricating nipple at regular intervals (~30-50 operating hours), clean and lubricate the spindel at the same time. The intervals depend on the given operating conditions and the duty cycle of the spindle gears. In case doubt please set up the lubrication plan together with us. The use of spindle spray increases the working life of the spindle and spindle nut. After approx. 200-300 operating hours the wear of the traveling nut or the worm wheel due to the backlash of threads should be checked. The maximal normal backlash of single trapezoid threads must not exceed 1/4 of the thread pitch. In the cases of multiple threads or special threads 1/4 of P is the maximum normal acceptable backlash. When the maximum normal backlash is reached the traveling nut or the worm wheel must be replaced. After a short run-in period all screws must be checked. After approx. 500 operating hours we recommend cleaning gear and spindle to remove the grease, checking all piece parts as to wear, and recharging them with new grease. Recommended lubricants: Shell Darina 2, Castrol Grease MS3, BP Energrease LS-EP2. The lubricant recommended can be used both for gears and spindles. If a high-grade spindle lubricant is to be used, we recommend Klueberplex GE 11-680. For special conditions (e.g. higher temperatures) we recommend the lubricants specified in the enclosed technical manual. In case of possible dirt accumulation in or damage of the spindle, expansion bellows or spring steel spirals must beused to protect thespindle. For oil-lubricated gears please ask for a special service manual. If you order spare parts the gear specifications marked on the type plate must be provided.

FREN Spindle gear for lifting, lowering, pulling,

pushing, sluing, or rotating

Forces up to 3000kN

Lifts up to 10000mm

FREN Electric cylinders for lifting, lowering, pulling,

pushing, sluing, or rotation

Forces up to 1000kN

Lifts up to 2500mm

FREN Bevel gears ‘K’ and Bevel gears cubic ‘H’for deflecting imput shaftsSpeeds up to 6500U/minTorques up to 5200Nm

FREN Resilient cardan shafts for transmitting

torques with assembling inaccuracies

Angles up to 3°

Torques up to 500Nm

FREN Telescopic gears and telescopic cylinders

for lifting, lowering, pulling, pushing

Forces up to 1000kN

Lifts up to 10000mm

FREN Planet gears in special designs for

reducing speeds and increasing torques

Gear reduction 1,5:1 up to 1500:1

Torques up to 1000Nm

FREN Scissor-type lifting platforms for lifting and lowering

including a wide range of accessories

Forces up to 500kN

Lifts up to 5000mm

FREN Cable winches for lifting, lowering, pulling

or sluing

Forces up to 300kN

Lifts up to 100000mm

Delivery programm